(enum indicator_style): New constant directory_only,

(enum indicator_style): New constant directory_only,
for -p.
(indicator_style_args, indicator_style_types): Set it appropriately.
(decode_switches, gobble_file, print_type_indicator):
(length_of_file_name_and_frills):
Implement the change described in NEWS.
(decode_switches): Quote ">", too.
(usage): Update to match the new behavior.  Describe ">".